The State Space Modeling of Single, Two and Three ALFC of Power System Using Integral Control and Optimal LQR Control Method

The modeling of electric power system on the state space with single, two and three area with integral and optimal control system known as Linear Quadratic Regulator(LQR) for designing the load frequency control system are realized in this paper. The fluctuations on voltage and frequency must be reduced to minimum level against load changes for obtaining high quality electric energy on electric power system. In this paper this is achieved by designing the integral controller and LQR .By using state-space analysis a state equation for three area load frequency is obtained. The proposed optimal LQR load frequency has been compared with integral control Simulink using MATLAB.